2-Aryl-3H-indol-3-ones: Synthesis, electrochemical behaviour and antiplasmodial activities
摘要:
The synthesis of indolone derivatives and their antiplasmodial activity in vitro against Plasmodium falciparum at the blood stage are described. The 2-aryl-3H-indol-3-ones were synthesized via deoxygenation of indolone-N-oxides. Electrochemical behaviour, antiplasmodial activity and cytotoxicity on human tumor cell lines were compared to those of indolone-N-oxides. The antiplasmodial IC50 (concentrations at 50% inhibition) of these compounds ranged between 49 and 1327 nM. Among them, the 2(4-dimethylaminophenyl)-5-methoxy-indol-3-one, 7, had the best antiplasmodial activity in vitro (IC50 = 49 nM; FcB1 strain) and selectivity index (SI (CC50 MCF7/IC50 FcB1) = 423.4). Thus, the hits identified in this deoxygenated series correspond to their structural homologs in the N-oxide series with comparable electrochemical behaviour at the nitrogen-carbon double bond. (C) 2014 Elsevier Masson SAS. All rights reserved.
Multi-site cyclization via initial C–H activation using a rhodium(<scp>iii</scp>) catalyst: rapid assembly of frameworks containing indoles and indolines
Tandem multi-site cyclization triggered by Rh(iii)-catalyzed C–H activation has been achieved for highly efficient synthesis of spirocycle indolin-3-one (C2-cyclization), benzo[a]carbazole (C3-cyclization) and an unusual indoxyl core (N1-cyclization).
An asymmetric normal-electron-demand aza-Diels–Alder cycloaddition of 2-aryl-3H-indol-3-ones and 2,4-dienals was explored via trienaminecatalysis of a chiral secondary amine. Multifunctional tricyclic polyhydropyrido[1,2-a]indoles were efficiently constructed in good stereoselectivity (up to 92% ee, >19 : 1 dr).
通过三烯胺催化手性仲胺探索了2-芳基-3 H-吲哚-3-酮和2,4-二烯的不对称正电子需求的氮杂-Diels-Alder环加成反应。多功能三环多氢吡啶并[1,2- a ]吲哚以良好的立体选择性(高达92%ee,> 19:1 dr)被有效地构建。
Synthesis of <i>N</i>
-Fused Seven-Membered Indoline-3-ones <i>via</i>
a Palladium-Catalyzed One-Pot Insertion Reaction from 2-Alkynyl Arylazides and Cyclic <i>β</i>
-Diketones
A novel insertion reaction of cyclic C‐acylimines into cyclic β‐diketones to construct N‐fused seven‐membered multifunctional polycyclic indoline‐3‐one derivatives has been described, which has shown good tolerance of various functional groups. The corresponding products were obtained in moderate to good yields under mild reaction conditions.
Organocatalytic asymmetric synthesis of arylindolyl indolin-3-ones with both axial and central chirality
作者:Xi Yuan、Xudong Wu、Fei Peng、Haijun Yang、Changjin Zhu、Hua Fu
DOI:10.1039/d0cc05432a
日期:——
An efficient method for chiralphosphoricacid-catalyzed asymmetric synthesis of arylindolyl indolin-3-ones with both axial and central chirality has been developed via the reaction of 3-arylindoles with 2-aryl-3H-indol-3-ones, and the target products were obtained in high yields with excellent enantioselectivity and diastereoselectivity.
Chiral phosphoric acid-catalyzed direct asymmetric mannich reaction of cyclic<i>C</i>-acylimines with simple ketones: facile access to C2-quaternary indolin-3-ones
作者:Jin-Shan Li、Yong-Jie Liu、Shen Li、Jun-An Ma
DOI:10.1039/c8cc05125a
日期:——
A chiral Brønsted acid-catalyzed directasymmetric Mannich reaction of simple ketones with cyclic C-acylimines has been established for the synthesis of C2-quaternary indolin-3-ones. In the presence of 5–10 mol% chiral phosphoric acid, a series of 2-(2-oxo-2-phenylethyl)-2-arylindolin-3-ones were obtained in good to high yield with up to 99% ee. The adducts obtained could be readily converted into
建立了手性布朗斯台德酸催化的简单酮类与环状C-酰基亚胺的直接不对称曼尼希反应,用于合成C2-季吲哚-3-酮。在5-10 mol%手性磷酸的存在下,以高达99%ee的良好或高收率获得了一系列2-(2-氧代-2-苯基乙基)-2-芳基吲哚-3-酮。通过简单的修饰,可以容易地将获得的加合物转化为二氢吲哚,三环吲哚-3-酮和四环四氢吲哚并[1,2- a ]喹啉。